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#!/usr/bin/env ruby | |
# A quick and dirty implementation of an HTTP proxy server in Ruby | |
# because I did not want to install anything. | |
# | |
# Copyright (C) 2009-2014 Torsten Becker <torsten.becker@gmail.com> | |
# | |
# Permission is hereby granted, free of charge, to any person obtaining | |
# a copy of this software and associated documentation files (the | |
# "Software"), to deal in the Software without restriction, including | |
# without limitation the rights to use, copy, modify, merge, publish, | |
# distribute, sublicense, and/or sell copies of the Software, and to | |
# permit persons to whom the Software is furnished to do so, subject to | |
# the following conditions: | |
# | |
# The above copyright notice and this permission notice shall be | |
# included in all copies or substantial portions of the Software. | |
# | |
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE | |
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION | |
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION | |
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
require 'socket' | |
require 'uri' | |
class Proxy | |
def run port | |
begin | |
# Start our server to handle connections (will raise things on errors) | |
@socket = TCPServer.new port | |
# Handle every request in another thread | |
loop do | |
s = @socket.accept | |
Thread.new s, &method(:handle_request) | |
end | |
# CTRL-C | |
rescue Interrupt | |
puts 'Got Interrupt..' | |
# Ensure that we release the socket on errors | |
ensure | |
if @socket | |
@socket.close | |
puts 'Socked closed..' | |
end | |
puts 'Quitting.' | |
end | |
end | |
def handle_request to_client | |
request_line = to_client.readline | |
verb = request_line[/^\w+/] | |
url = request_line[/^\w+\s+(\S+)/, 1] | |
version = request_line[/HTTP\/(1\.\d)\s*$/, 1] | |
uri = URI::parse url | |
# Show what got requested | |
puts((" %4s "%verb) + url) | |
to_server = TCPSocket.new(uri.host, (uri.port.nil? ? 80 : uri.port)) | |
to_server.write("#{verb} #{uri.path}?#{uri.query} HTTP/#{version}\r\n") | |
content_len = 0 | |
loop do | |
line = to_client.readline | |
if line =~ /^Content-Length:\s+(\d+)\s*$/ | |
content_len = $1.to_i | |
end | |
# Strip proxy headers | |
if line =~ /^proxy/i | |
next | |
elsif line.strip.empty? | |
to_server.write("Connection: close\r\n\r\n") | |
if content_len >= 0 | |
to_server.write(to_client.read(content_len)) | |
end | |
break | |
else | |
to_server.write(line) | |
end | |
end | |
buff = "" | |
loop do | |
to_server.read(4048, buff) | |
to_client.write(buff) | |
break if buff.size < 4048 | |
end | |
# Close the sockets | |
to_client.close | |
to_server.close | |
end | |
end | |
# Get parameters and start the server | |
if ARGV.empty? | |
port = 8008 | |
elsif ARGV.size == 1 | |
port = ARGV[0].to_i | |
else | |
puts 'Usage: proxy.rb [port]' | |
exit 1 | |
end | |
Proxy.new.run port | |
Would love to see a license as well. :-)
@randomcamel @dg-vrnetze I added MIT license, I hope that works for you guys!
Perfect. Thanks a lot.
Hi, I have a question on Line 82. I tried to comment out this line and found the server stop proxy. Why should we send an Connection: Close
line to the server while neglecting the client's origin Connection
field? I don't understand it, can you explain?
Newbie in network, not native English speaker :)
i tried to fire it up and put it as my nexus7 proxy but every time i try to load a website in browser it shows a white screen, when i logged all data in console it showed the pages are received but apparently it isn't sent to the machine or send in the wrong way.
it works really well... just one problem, huge for me, cannot use it for ssl content (https)
A http (and https) proxy server comes bundled with Ruby
ruby -r webrick/httpproxy -e 'WEBrick::HTTPProxyServer.new(Port: 8080).start'
API reference:
http://ruby-doc.org/stdlib-2.5.0/libdoc/webrick/rdoc/WEBrick/HTTPProxyServer.html
Hope this helps,
The loop at line 95 should check for a nil return value from #read
, otherwise it may not work correctly for chunked responses.
while to_server.read(4048, buff)
to_client.write(buff)
end
"If length is a positive integer, read tries to read length bytes without any conversion (binary mode). It returns nil if an EOF is encountered before anything can be read."
I don't see a license: is it okay if I use this code? I want to adapt it into a custom no-dependencies proxy for the Chrome Postman app.